package com.tanhua.dubbo.server.api;

import com.alibaba.dubbo.config.annotation.Service;
import com.tanhua.dubbo.server.entity.RecommendUser;
import com.tanhua.dubbo.server.vo.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

import java.util.List;

/**
 * @Description AUTO
 * @ClassName RecommendUserApiImpl
 * @Author ZhengXinjie
 * @date 2021.02.20 14:49
 */
@Service(version = "1.0.0") // 申明这是一个dubbo服务
public class RecommendUserApiImpl implements RecommendUserApi {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Override
    public RecommendUser queryWithMaxScore(Long userId) {
        // 查询得分最高的用户, 按照得分倒序排序
        Query query = Query.query(Criteria.where("toUserId").is(userId)).with(Sort.by(Sort.Order.desc("score"))).limit(1);
        return mongoTemplate.findOne(query, RecommendUser.class);
    }

    @Override
    public PageInfo<RecommendUser> queryPageInfo(Long userId, Integer pageNum, Integer pageSize) {
        // 分页并且排序参数
        PageRequest pageRequest = PageRequest.of(pageNum - 1, pageSize, Sort.by(Sort.Order.desc("score")));

        // 查询参数
        Query query = Query.query(Criteria.where("toUserId").is(userId)).with(pageRequest);

        List<RecommendUser> recommendUserList = mongoTemplate.find(query, RecommendUser.class);

        // 暂时不提供数据总数
        return new PageInfo<>(0, pageNum, pageSize, recommendUserList);
    }
}

